Three Month Investigation Leads to Arrest of Cambridge Man for Arson


Deputy State Fire Marshals have arrested a 31-year-old Cambridge man for arson and numerous other charges stemming from an arson fire on September 23rd of this year at 406 Muir Street in Cambridge. Following a thorough three month long criminal investigation conducted by Deputy State Fire Marshals, Roberto O’Donald Gross was identified and then located today in Cambridge where he was taken into custody without incident. Gross faces charges of Arson 1st and 2nd Degree, Malicious Burning 1st and 2nd Degree, Home Invasion, Burglary 3rd and 4th Degree and two counts of attempted manufacture of a destructive device. Gross is currently being held without bond at Dorchester County Detention Center after seeing a Court Commissioner.  If found guilty of all charges, Gross faces a maximum penalty of 144 years and 6 months of incarceration and/or $145,500 in fines.

Original Release and Details from the Maryland State Fire Marshal (September 23rd, 2023):

September 23, 2023

Time: 5:30 P.M.

Location / Address: 406 Muir Street, Cambridge, Dorchester Co 

Type of Incident: Structure Fire

Description of Structure / Property: Two story, wood frame, single family dwelling

Injuries or Deaths: None

Estimated $ LossStructure: $1,400.00   Contents: $100.00

Smoke Alarm Status: Present; Unknown if activated

Fire Alarm / Sprinkler Status:  Not present

Discovered By:  The fire is believed to be the result of an ongoing domestic issue.  The occupant had not been home since 9/22/23 due to fearing for her safety.  The fire was discovered by a friend of the occupant who went to collect some of her belongings on 9/23/23 at which time it was reported to Cambridge Police and eventually the Office of the State Fire Marshal.